So me and my friends started playing this game days ago. Among the three classes, I kinda like the Priest and the Wizard so I decided to main Priest since he has those cool life drain skills and my none of my friends picked it. Yet, when I tried out the MP today, I am really lucky to get an 21 Level Legendary Item - Korenchkin's Tactical Tunic, which is a wizard robe. This made me have seconds though to change my main from Priest to Wizard.. (My Priest is like level 7-ish while my wizard is 5-ish). Discussions welcome. Thank you
If you really can't decide, you can always level up a team of all 3 by yourself fairly quickly and play whatever you feel like when your friends are around. Don't let finding one item dictate how you play the rest of the game though; you'll find plenty more legendary items as you progress. In fact, priests have access to the only guaranteed legendary loot in the game.
When I started out, I wanted to run warriors. However, the RNG kept giving me legendary firestorm items and great priest weapons & gear. I got garbage for warrior gear. I ran firestorm with a support priest. Sometimes you need to go with your most powerful assets, but know that the drops will shift over time. Be flexible.
Considering that in SP there are quests that require very specific teams, I have 9 characters: 3 x Human Warriors, 3 x Dwarf Priests, 3 x Elf Wizards. I've only played those specific quests with these configurations and normally like to use one class of every type. For farming I've started to use 2 x wizards and 1 x priest to speed things up.